Back in 2013, before his recent retirement, before his second Super Bowl win, Peyton Manning wasn’t sure if he would ever play football again.  After surgeons removed the bulging cervical intervertebral disc in his neck, the pain was gone but then the rehab learning process was just beginning.  

Damage to the surrounding nerves along with new metal hardware now holding together the vertebrae above and below the injured area caused a communications disruption between Manning’s brain and that well-trained right arm.  The result was a future Hall of Fame quarterback having to relearn how to throw a football.